I need to limit the disk usage of 10s of users. All the target users belong to the same group.

It looks edquota -g <group-name> enforces the limit across all users of the group. In other words, that command let all users of the group altogether allocate specified amount of disk. I want the restriction to be applied to each individual user independently. Is there any option in edquata for this goal?

The naive solution: Repeating the edquoata -u <user-name> for each user one-by-one.